Multiple Choice
A phosphate buffer (H2PO4-/HPO42-) has a pH of 8.3. Which of the following changes will cause the pH to increase?
A) dissolving a small amount of Na2HPO4
B) dissolving a small amount of NaH2PO4
C) adding a small amount of dilute hydrochloric acid
D) adding a small amount of dilute phosphoric acid
E) making the buffer more concentrated by removing some water
Correct Answer:
Verified
Correct Answer:
Verified
Q12: A formic acid buffer containing 0.50 M
Q30: What volume of 0.500 M H<sub>2</sub>SO<sub>4 </sub>is
Q68: At the equivalence point in an acid-base
Q83: When 0.300 g of a diprotic acid
Q93: You need to use KH<sub>2</sub>PO<sub>4</sub> and K<sub>2</sub>HPO<sub>4</sub>
Q98: The salts X(NO<sub>3</sub>)<sub>2</sub> and Y(NO<sub>3</sub>)<sub>2</sub> (where X<sup>+</sup>
Q99: What mass of NaF must be added
Q100: A buffer is prepared by adding 300.0
Q101: What will be the effect of adding
Q103: The salts X(NO<sub>3</sub>)<sub>2 </sub>and Y(NO<sub>3</sub>)<sub>2</sub> (where X<sup>+</sup>